2003 Mustang Engine Information – 281 cubic inch V-8 (4.6 L Ford Modular V8)
Ford’s Modular 4.6L SOHC V8
There were three versions of the 4.6 liter V8 available in 2003.
The Mach 1 got a 305 hp version of the 4.6L engine which was only available in the Mach 1 Mustang. The success of the 2001 Bullitt led to the production of this special edition Mach 1. The Mach 1 version of the 4.6 L DOHC engine bumped power to 305 hp. This all-aluminium engine features the same high flow heads as the 2003 – 2004 SVT Cobra. The engine also has intake camshafts sourced from Lincoln’s 5.4 Liter “InTech” V8 to provide more mid-range torque. It was was equipped with a Windsor Aluminum Plant or WAP block unique from the Teksid aluminium blocks used in the 1996–1999 Cobras
The Cobra engine was based on the engine available in the 1999 and 2001 Mustang Cobras, with new cylinder heads. The result was 390 hp @ 6,000 rpm and 390 lb/ft of torque at 3,500 rpm,. The 4.6 liter, supercharged engine is electronic fuel injected and have double overhead cams.
| Year | 2003 |
| VIN Code | X (GT) |
| Cylinders | 8 |
| Displacement | 281 cu / 4.6 liters |
| Power (hp) | 320 hp @ 6,000 RPM |
| Torque (lb/ft) | 317 lb/ft @ 4,750 RPM |
| Compression | 9.9:1 |
| Type | DOHC |
| Year | 2003 |
| VIN Code | R (Mach 1) |
| Cylinders | 8 |
| Displacement | 281 cu / 4.6 liters |
| Power (hp) | 305 hp |
| Torque | 320 lb/ft |
| Compression | 10.1:1 |
| Type | DOHC |
| Year | 2003 |
| VIN Code | Y (Cobra) |
| Cylinders | 8 |
| Displacement | 281 cu / 4.6 liters |
| Power (hp) | 390 hp @ 6,000 RPM |
| Torque (lb/ft) | 390 lb/ft @ 3,500 RPM |
| Compression | 9.4:1 |
| Type | DOHC |
